Note: The March 24, 2010, Cisco IOS Software Security Advisory bundled
publication includes seven Security Advisories. All the advisories address
vulnerabilities in Cisco IOS Software. Each advisory lists the releases that
correct the vulnerability or vulnerabilities detailed in the advisory. The
table at the following URL lists releases that correct all Cisco IOS Software
vulnerabilities that have been published on March 24, 2010, or earlier:

Only Cisco 7200 Series and Cisco 7301 routers with VPN Acceleration
Module 2+ (VAM2+) are affected by this vulnerability.

To display a summary of the configuration information for the crypto
engines and to determine if a VAM is present and used in the device, use the
show crypto engine brief command, as shown in the following
example:

Note: In the previous example, the "Product Name" VAM2+
is displayed, indicating that the router has the VAM2+ installed. The
Enabled keyword under "State" indicates that the VAM2+ is
enabled and active.

IKE is enabled by default if IPsec is used. Cisco IOS devices that are
configured for IKE will listen on UDP port 500, UDP port 4500 if the device is
configured for NAT Traversal (NAT-T), or UDP ports 848 or 4848 if the device is
configured for Group Domain of Interpretation (GDOI). The following outputs
show a router that is listening on UDP port 500:

To determine the Cisco IOS Software release that is running on a Cisco
product, administrators can log in to the device and issue the show
version command to display the system banner. The system banner
confirms that the device is running Cisco IOS Software by displaying text
similar to "Cisco Internetwork Operating System Software" or "Cisco IOS
Software." The image name displays in parentheses, followed by "Version" and
the Cisco IOS Software release name. Other Cisco devices do not have the
show version command or may provide different output.

The following example identifies a Cisco product that is running Cisco
IOS Software Release 12.3(26) with an installed image name of C2500-IS-L:

IPsec is an IP security feature that provides robust authentication and
encryption of IP packets. IKE is a key management protocol standard that is
used with the IPsec standard.

IKE is a hybrid protocol that implements the Oakley and SKEME key
exchanges inside the Internet Security Association and Key Management Protocol
(ISAKMP) framework. (ISAKMP, Oakley, and SKEME are security protocols that are
implemented by IKE.). More information on IKE is available at the following
link:

Cisco has provided scores for the vulnerability in this advisory based
on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this
Security Advisory is done in accordance with CVSS version 2.0.

CVSS is a standards-based scoring method that conveys
vulnerability severity and helps determine urgency and priority of response.

Cisco has provided a base and temporal score. Customers can
then compute environmental scores to assist in determining the impact of the
vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions
regarding CVSS at

When considering software upgrades, also consult
http://www.cisco.com/go/psirt
and any subsequent advisories to determine exposure and a complete upgrade
solution.

In all cases, customers should exercise caution to be
certain the devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported properly by
the new release. If the information is not clear, contact the Cisco Technical
Assistance Center (TAC) or your contracted maintenance provider for assistance.

Each row of the Cisco IOS software table (below) names a
Cisco IOS release train. If a given release train is vulnerable, then the
earliest possible releases that contain the fix (along with the anticipated
date of availability for each, if applicable) are listed in the "First Fixed
Release" column of the table. The "Bundle First Fixed Release" column indicates
the earliest possible releases which have fixes for all the published
vulnerabilities in this Cisco IOS Security Advisory bundled publication. Cisco
recommends upgrading to the latest available release where possible.

Major Release

Availability of Repaired Releases

Affected 12.0-Based Releases

First Fixed Release for this
Advisory

First Fixed Release for all Advisories in 24 March 2010
Bundle Publication

There are no affected 12.0 based releases

Affected 12.1-Based Releases

First Fixed Release for this
Advisory

First Fixed Release for all Advisories in 24 March 2010
Bundle Publication

There are no affected 12.1 based releases

Affected 12.2-Based Releases

First Fixed Release for this
Advisory

First Fixed Release for all Advisories in 24 March 2010
Bundle Publication

Cisco has released free software updates that address this
vulnerability. Prior to deploying software, customers should consult their
maintenance provider or check the software for feature set compatibility and
known issues specific to their environment.

Customers with contracts should obtain upgraded software through their
regular update channels. For most customers, this means that upgrades should be
obtained through the Software Center on Cisco's worldwide website at
http://www.cisco.com.

Customers whose Cisco products are provided or maintained through prior
or existing agreements with third-party support organizations, such as Cisco
Partners, authorized resellers, or service providers should contact that
support organization for guidance and assistance with the appropriate course of
action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on
specific customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected products
and releases, customers should consult with their service provider or support
organization to ensure any applied workaround or fix is the most appropriate
for use in the intended network before it is deployed.

Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party vendors but
are unsuccessful in obtaining fixed software through their point of sale should
acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC
contacts are as follows.

+1 800 553 2447 (toll free from within North America)

+1 408 526 7209 (toll call from anywhere in the world)

e-mail: tac@cisco.com

Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to a free
upgrade. Free upgrades for non-contract customers must be requested through the
TAC.

The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory. This vulnerability was
found during the resolution of customer service requests.

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.

In addition to worldwide web posting, a text version of
this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.

cust-security-announce@cisco.com

first-bulletins@lists.first.org

bugtraq@securityfocus.com

vulnwatch@vulnwatch.org

cisco@spot.colorado.edu

cisco-nsp@puck.nether.net

full-disclosure@lists.grok.org.uk

comp.dcom.sys.cisco@newsgate.cisco.com

Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on mailing lists or
newsgroups. Users concerned about this problem are encouraged to check the
above URL for any updates.